Quiz: Input and Output | Operators

Introduction

Quiz: Input and Output | Operators checks how well you can apply printf with multiple specifiers and scanf with & for integers (and related ideas) in C. Try each prompt in a scratch file before moving on.

Understanding the topic

Challenge 1 In your own words — or with a tiny program — show that you understand: printf with multiple specifiers.

Challenge 2 In your own words — or with a tiny program — show that you understand: scanf with & for integers.

Challenge 3 In your own words — or with a tiny program — show that you understand: Result of 10 % 3 and 10 / 3.

Challenge 4 In your own words — or with a tiny program — show that you understand: Logical expression (5 > 3 && 2 < 1).

• Challenge 1 — In your own words — or with a tiny program — show that you understand: printf with multiple specifiers.
• Challenge 2 — In your own words — or with a tiny program — show that you understand: scanf with & for integers.
• Challenge 3 — In your own words — or with a tiny program — show that you understand: Result of 10 % 3 and 10 / 3.
• Challenge 4 — In your own words — or with a tiny program — show that you understand: Logical expression (5 > 3 && 2 < 1).

Step-by-step explanation

1. Challenge 1 — In your own words — or with a tiny program — show that you understand: printf with multiple specifiers.
2. Challenge 2 — In your own words — or with a tiny program — show that you understand: scanf with & for integers.
3. Challenge 3 — In your own words — or with a tiny program — show that you understand: Result of 10 % 3 and 10 / 3.
4. Challenge 4 — In your own words — or with a tiny program — show that you understand: Logical expression (5 > 3 && 2 < 1).

Execution workflow

Best practices

• Enable warnings: gcc -Wall -Wextra -std=c11 source.c -o app
• Give every variable a defined value before it is read.
• Stay inside array bounds — C will not stop you from over-running a buffer.

Common mistakes

• Reading uninitialized storage — behavior is undefined.
• Dismissing compiler warnings instead of fixing root causes.
• Ignoring NULL returns from malloc, fopen, and similar APIs.

Hands-on exercise

Practice problems:

• Build or explain: printf with multiple specifiers
• Build or explain: scanf with & for integers
• Build or explain: Result of 10 % 3 and 10 / 3
• Build or explain: Logical expression (5 > 3 && 2 < 1)

Summary

Quiz: Input and Output | Operators in C — Self-check on printf/scanf and operator behavior.